. Author manuscript; available in PMC: 2011 Jan 6.

Published in final edited form as: J Psychoactive Drugs. 2010 Sep;42(3):401–412. doi: 10.1080/02791072.2010.10400703

Table 3.

BOLD Response Differences to the Spatial Working Memory Task between Recent (n=13) and Abstinent (n=13) Marijuana Users

Anatomic Region	Brodmann’s Area	Volume (μl)	Talairach Coordinates^a			Effect Size Cohen’s d^b
Anatomic Region	Brodmann’s Area	Volume (μl)	x	y	z	Effect Size Cohen’s d^b
*Recent > Abstinent*
Medial cingulate, medial frontal gyrus, left superior & middle frontal gyri	8	6129	2	23	42	2.34
Medial bilateral superior frontal gyrus	6, 8	1539	2	26	57	1.63
Left insula & precentral gyrus	13	4347	−53	14	6	1.49
Right insula & inferior frontal gyrus	13	2484	41	23	−7	1.90
*Abstinent > Recent*
Right precentral gyrus	4	1431	56	−17	39	1.62

Talairach coordinates refer to maximum signal intensity group difference within the cluster

Cohen’s d calculated from average t-value of all voxels within the cluster